--- /dev/null
+(* $Id$ *)
+
+open GMain
+open Gdk
+
+(* load image *)
+let buf = String.create (256*256*3)
+let ic = open_in_bin "image256x256.rgb"
+let _ =
+ really_input ic ~buf:buf ~pos:0 ~len:(256*256*3);
+ close_in ic
+
+let rgb_at x y =
+ let offset = (y * 256 + x) * 3 in
+ (int_of_char buf.[offset ],
+ int_of_char buf.[offset+1],
+ int_of_char buf.[offset+2])
+
+(* let id = Thread.create GtkThread.main () *)
+
+(* Choose a visual appropriate for RGB *)
+let _ =
+ Gdk.Rgb.init ();
+ GtkBase.Widget.set_default_visual (Gdk.Rgb.get_visual ());
+ GtkBase.Widget.set_default_colormap (Gdk.Rgb.get_cmap ())
+
+(* We need show: true because of the need of visual *)
+let window = GWindow.window ~show:true ~width: 256 ~height: 256 ()
+
+let visual = window#misc#visual
+
+let color_create = Truecolor.color_creator visual
+
+let w = window#misc#window
+let drawing = new GDraw.drawable w
+
+let _ =
+ window#connect#destroy ~callback:Main.quit;
+
+ let image =
+ Image.create ~kind: `FASTEST ~visual: visual ~width: 256 ~height: 256
+ in
+
+ let draw () =
+ for x = 0 to 255 do
+ for y = 0 to 255 do
+ let r,g,b = rgb_at x y in
+ Image.put_pixel image ~x: x ~y: y
+ ~pixel: (color_create ~red: (r * 256) ~green: (g * 256) ~blue: (b * 256))
+ done
+ done
+ in
+
+ let display () =
+ drawing#image image ~xsrc:0 ~ysrc:0 ~xdest:0 ~ydest:0 ~width:256 ~height:256
+ in
+
+ draw ();
+
+ window#event#connect#after#expose ~callback:
+ begin fun _ ->
+ display (); false
+ end;
+ (* Thread.join id *)
+
+ window#show ();
+ Main.main ()